CVE-2026-23326

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Source
https://cve.org/CVERecord?id=CVE-2026-23326
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23326.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-23326
Downstream
Related
Published
2026-03-25T10:27:19Z
Modified
2026-08-12T03:51:27Z
Summary
xsk: Fix fragment node deletion to prevent buffer leak
Details

In the Linux kernel, the following vulnerability has been resolved:

xsk: Fix fragment node deletion to prevent buffer leak

After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below.

xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list.

Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23326.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
560c974b7ccd95bb9ff20df77f6654283e45c9c6
Fixed
5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
fd5614763805d6f386bd07cc53558f88b1b1eb62
Fixed
2a9ea988465ece5b6896b1bdc144170a64e84c35
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
b692bf9a7543af7ad11a59d182a3757578f0ba53
Fixed
645c6d8376ad4913cbffe0e0c2cca0c4febbe596
Fixed
b38cbd4af5034635cff109e08788c63f956f3a69
Fixed
60abb0ac11dccd6b98fd9182bc5f85b621688861

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23326.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.17
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23326.json"